@b12474e1 @8379395e A good way of understanding that stuff is to write debug visualizations, even if super crude. In your code, draw a few circles and lines and whatnot in reaction to the input data (or also, based on your own tentative calculations).

Seeing stuff react *live* is so effective at giving you an intuitive understanding of how the values behave, how they relate. You see what goes down and up as you rotate the phone, you notice thresholds that are never crossed, etc. Effective and fun 😃